Transmission-gearing for motor-vehicles.



R. HUP?. TRANSMISSION GEARING FOR MOTOR VEHICLES.'

APPLICATION FILI-ED DEG. 31, 1910.

Patented Ju1y23, 1912.

z SHEETS-*s111121* 1.

n. HUFP.. TRANSMISSION 1L-111111111011 MOTOR VEHICLES,

XPPLICATION rLED 1126.31, 1919.

2 SHEETS-SHEET 2,

attenua Y UNITED sTATEs PATENT oEEICE.

RUSSELL HUFF, OF lDETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS,l TO' PACKARD MOTOR CAR COMPANY, OF DETROIT, MICHIGAN, A CORPORATIONl OF MICHIGAN.

Specification of Letters Patent.

TRANSMISSION -GEARING FOR MOTOR-VEHICLES.

1910. Serial No. 600,349.

gearing of the selective type, 'certain of the gears of which are always in mesh and so arranged that during the operation of changing speed the gears will engage without noise and the danger of breakage reduced to a minimum.

Another object is the provision of a construction wherein the change speed mechanism will be supported by the rear axle housing, the distance between. the end gears of said mechanism correspondingapproximately to the width of four gear faces, whereby the flexibility and weight of the parts will be reduced to a minimum.

' Astill further'object is the provision of arelativelyY short casing for the change speed mechanism, this casing being open at one end and provided with a closure which forms a bearing for the change speed mechanism. `W ith this construction, two advantages are gained, first, the weight of the casing is reduced and second, access to the speed changing mechanism is simplified.

Other advantages will appear and be more fully; understood in the following description, taken in connection with the accompanying drawings, in which- Figure 1 is a longitudinal sectional view through the change speed and differential mechanism; and Fig. 2 is a horizontal sectional view of the casing.

A designates the change speed casing and` B the differential gear casing. The change speed casing is open at one end and atthis end Lis provided with a lateral iange The opposite end of the casing is provided with a pair of forward or outwardjextensions designated by the numerals G and 7,

vinternal teeth 21 and a the latter' extending beyond the former. A

tail piece i nicely fits into the open end of the casing A and on its inner'face is provided with bearing lugs 8 and 9 in alinement with the extensions 6 and 7. The opposite face of the tail piece is provided with bearing lugs 1() and 11 which form supports for the rear axles 12 arranged in the casing B. The differential housing 13 receives the Patented J u1y23, 1912. e Original application led May 6, 1909, Serial No. 494,456. Divided and lthis application led December 31,

inner ends .of the axles 12 and is provided c with a bevel gear 1,4. y

Arranged in the casing A` is a driven shaft- 15 in axial alinement 'with the main driving shaft 16.I drix-'ing shaft connects with the motor (not shown The counter-shaft 17 is located in the casing A, its opposite ends being supported by the b earing lug 8 and extension (i in a manner to be presently described. The shaft 16 is provided at its inner end with a tlange 17 to which is bolted a -relatively wide gear 18 which meshes with a gear 2G of equal width sliding on the counter shaft 17. rIfhe gear 2O is an overhung gear having sleeve having a collar 23.

A portion ot' the which the gear 20 is mounted, is non-cylindrical in cross section so that the gear 20 will turn-therewith. A portion of the countershaft 17 to thefrearf'ofv thev gear 2O is rounded as shown at 24, and rotatably mounted on the portion 24, is an overhung gear 25 of less diameter than the gear 20 and Iso positioned that when the gear 20 is moved rearwardly theinter'nal teeth of the latter will .mesh with the teeth on the gear wheel 25. the rear of the gear wheel 25 is a sleeve 2G provided at its opposite ends with gear wheels 27 and 28 of dilierent diameters. The larger gear wheel 27 lies adjacent to the overhung gear 25 and is of a size to'telescope the latter.

countershaft 17, upony Sliding on the Countersha-Aft 17 to' One end of the main sleeve 22, the said The driven shaft 15 is non-cylindrical in contour and sliding on this shaft and turning therewith is an overhi'ing Vgear 29 lo-r cated to the-rear of the gear 1S. The face of the overhung gear 29 is less than the width of the face of the gear 18.A The overhung gear 29 meshes with the gear 5, and the said overhung gear is provided with internal teeth 30 toengage the gear 1S when the gearK Q9 is moved in one direction in the manner to be presently described. 'l'ht ovni-hung gear 2S) is provided on one side with a sleeve .'51 having adjacent to its outer end a collar 3Q. rl`he driven shat'tI 15 is provided with a flange 38 to which is bolted an overhung gear 34. A. sliding sleeve 555 provided with ,a gear 3G is mounted upon a second countershatt and this sleeve with its gear ,is connected with the sleeve 26 so as to slide therewith. The gear 36 constantly meshes with the gear QS at the rear ei'id of the sleeve 2U, and is adapted to slide forwardly and mesh with gear 34. for reversing. The rear end of the driven shaft 15 is provided with a bevel pinion 37 which meshes with the bevel gear 14 on the ditterential housing 13.

As shown in Fig. l, the gears 1S and Qt) are in mesh; so also are the gears 29 and, and the gear 8l is positioned between the gears 2T and i' 28. '.lhe gears so arranged will be in neutral position, by virtue of the loose gear 25. Low speed is obtained by shittingii into engagement with 34, it beingunderstood that the latter is the largest gear in the casing. then this'y shift has been made the trainwill then be 18, :20, Q5, 2t), 27. and l. Inasinuch as the gear 25 is loose on the oountershatt 17, motion will be imparted to the driven shaft 15 only by the gear 27. The second speed is obtained by shifting Q0 into engagement with 25. When this is being done, the gear 29 will more simultaneously with the gear 2() in order to permit. the internal teeth of the gear 2() toiengage the gear Q5. The train will then be 1H, 2t), 25 and 2t). It will be observed that a single shifter 'may operate both gears 20 and Qi), bearings tor the shifter being provided by the sleeves 22 and 31, and also bv the collars 23 an'd 32. It will be t'urther observed when the parts are moved from the position shown in Fig. 1, to second speed, that the gears 18 and 20 will never move. completely out of mesh, neither will the gears :25 and 2t), whereby the shift will be made noiselersly and the danger oi the teeth breaking, which sometimes results when the gears are slammed into engagement freni one speed to another, will be practically prevented. The third speed or direct drive is obtained by shitting 29 into engagement with 1S during which movement, gear 2U will move simultaneously with gear 2t), but in a direction opposite to that described when second speed is to be obtained. The train will then be 1S and Q0. Reverse is obtained by sliding the sleeves 2G and 35 so that gear 3G engages with gear 34.

lt. will be noted that gc'L r 27 is slightly overhang 'to receive the hub 258 of gear 25, thus permitting a maximum movement tor theI sleeve 26 with a minimum distanec between the gears 27 and 2S, and for a similar purpose, thbendof the gear 34 which faces the sleeve 251 provided with an enlarged opening 39 to receive the end of the sleeve 31 when the parts have been shifted for second speed. With this. construction, it will be noted that the distance between the .attaching webs of the gears 18 and 341 is equal approximatelytto the width of four gear taces.I wherebyv the total length of the gear casing is reduced to a minimurn. e

/10 is an exteriorly threaded sleeve screwed into the bearing lug 9 of the en d piece, C, this sleeve being held in locked position by a `locking device 40. This sleeve is provided on its internal surface with a shoulder 4t2. The pinion 37 is provided with a shank t3 which surrounds the shaft 15 and extends into the sleeve The shank is provided with a number ot shoulders asshown.f The sleeve reoei ves the annular roller bearing 44e;

the outer ring' ot' which tightly tits in the sleeve and the inner ring is secured to the shank 43 by means of the threaded nut 45. The roller thrustbearing. 46 is received between the annular rings 4-7 and t8 and surrounds the shank 43. Ring 47 bears against the shoulder t2 and is rest 'ained thereby. The ring Lt8 is secured in place by means ot' au inwardly projecting flange 49 on the threaded sleeve. 50. The sleeve 50 is held in adjusted position by means oi the loeking' device 41. The construction of the sleeve il and its bearings are such that the thrust of the pinion 37 on the shaft 15 is received in both directions through the' roller bear ings 46.

The gear 1S has on its interior surface the roller hearing 52 tor one end of the draft lf, and this roller bearing bears against a lug on the fiange 17. The shatt 17 is supported in roller bearing 54 in the lug` 8 of the tail piece C, the opposite end ot' the shaft. being supported by roller bearingl 55 in the extension 6. The extension 7 ot the casing A is provided with an inwardly projecting sleeve 56, Webs 57 connecting this sleeve with the extension 7. lhe sleeve 56 provided with an enlarged portion 58 to receive" the roller bearing 59 which `supports one end of the shaft 16. 'lhe easing 60 extends into the sleeve 56. 'lhis casing surrounds the shaft 16 and is flexibly connected atl one end tothe frame ot' the vehicle (not shown) and acts as a torsion rod for the rear axle casing and a housing for the shaft 1G.

. Referring now to Fig. l, it will be seen thatI the easings A and B, are connected by bolts (il which pass through the flange 5 of the easing A and also through a flange G2' on the end piece (l. The bearing lugs 10 and '1l ot the end piece C receive the bearing sleeves (33 for the hubs 64 of the differ-v ential housing. The outer end of the bearing lug t) is provided with a lug 65 for support-ing the roller bearing 66 for the driven shaft.

The term roller bearing as used in the specification and claims is used in its broadest sense, that is as a generic term including both ball and cylinder anti-friction bearings.

With this construction, it will be manifest when the end piece C is removed, allmechanism can be removed at the i end of the casing A. It will beseen that the'sleeve 40 is of greater diameterl than the pinion 37 so that when the locking degree 67 is loosened, the sleeve and its lattached parts may be removedas a unit, or if desired, the end piece C with all the parts attached thereto may be removed by removing the b'olts 6l.

Having thus described the invention, what is claimed is: Y

1. In transmission gearing, in combination, a shaft, intermediate and opposite end gears arranged on said shaft, said intermediate gear being fixed against axial movenie-nt and adapted to telescope within one of said'endv gears, and the other end gear being adapted to telescope within said intermediate gear.

2. In transmission gear-ing,` in combination, parallel shafts, a gear fixed on one of said shafts, a gear rotatably mounted on the. other of ,said shafts, and internally toothed overhung gears splined on both of said shafts to receive the fixed and rotatable gears.

3. In transmission gearing, in combination, parallel shafts, a gear fixed on one of said shafts, a gear rotatably mounted on the other of said shafts, internally toothed over- .hung gears splined on both of said shafts to simultaneously receive the fixed and rotatablegears g 4". In transmission gearing, .in combination, drive, driven, and counter-shafts, a drive gear fixed on the drive shaft, a gear slidingly mounted on the counter-shaft and meshing with the drive gear, a gear slid; ingly mounted on the driven shaft, and a gear rotatably mounted on the counter-shaft and meshing with the gear on the driven shaft, the said sliding gears being movable into loose engagement with each other without disengaging from-said fixed and rotatably mounted gears.

ln transmission gearing, in combination, drive, driven, and counter-shafts, a drive gear fixed on the drive shaft, a gear slidingly mounted on t-he counter-shaft and meshing with the drive gear, a' gear slidingly mountedoii the driven shaft, and a gear rotatably mounted on the counter-shaft and meshing with the gear on the driven shaft, the sliding gear on thecounter-shaft beine ada ted to iosilivel enfafe the said' n Y zo :e

rotatably'mounted gear and loosely engage the sliding gear on the driven shaft with-A` out disengaging from the fixed gear on the drive shaft. l

6. The combination with the two alined shafts land the countershaft parallel 'therewith, of a gear on each of said alined shafts and two gears on said countershaft respectively in mesh with-the gears on the alinedv r shafts, means for clutching together andy iinclutching the gears on the alined shafts, and means for clutching together andkunclutching the gears on the countershaft. f 7. The combination with the: two alined shafts and a countershaft parallel therewith, of a gear on ,each of said alinedshafts and two gears on said countershaft respectively in mesh with the gears on the alined shafts, means for clutchingt-ogether and unclutching the gears on the alined shafts, and means for clutching together and unclutching the gears on the coiintershaft without moving any of the gears out of mesh.

8. The combination with alined shafts and a countershaft, o-f a gear on each of said alined shafts adapted to be brought` into clutchingA relation one with the other whereby one shaft may be directly driven by the other, a gearv rotatably mounted on said countershaftand in mesh with one' of the gears on the alined shafts, and a sliding gear mounted to turn with said countershaft and adapted to be inconstant mesh with the other gear on said alined shafts and to be moved into clutching engagement with the rotatably mounted gear on the countershaft.

9. The combination with alined shafts and a countershaft, of a pair of-gears on the alined shafts one of which is slidable and adapted when moved in one direction to be brought into clutching engagement with the other of said gears, and a pair of, gears on the countershaft respectively in mesh withV the gears on the-alined'shafts, one of said latter pair of gears being movable in the other direction to effect a clutching engagement with its companion gear.

l0. In transmission gearing, the combination with two alined shafts, a parallel countersha'ft and a parallel reverse shaft, of gears and clutches on said shafts arranged to transmit rotary motion from one alined.

moved from their neutral positions in either direction to obtain the other two speeds.

l1. The combination with ajdriving shaft,V

to obtain twol of said speeds and the otherltwoof which gears are adapted to be simultaneously,

a driven shaft, alined therewith, and a parallel countershaft,. of 'a gear fast on the driving sha-ft, a sliding spur gear on the driven shaft having teeth adapted to engage eo'pcrating teeth on said driving gear7 and gears on said countershaft in constant .mesh respectively with the driving` gear and spur gear.

12. ,ln transmission gearing, the combination with Change speed and differential mechanism; oil a easing open at one end and inclosing said cllange speed mechanism, an end pieec forming a closure ttor the open end oi the easing and detachabl)Y secured thereto, said end piece having on one face thereo:l in YardlY extending` bearings for the change speed mechanism and further having on the opposite face outwardly extending bearings for the fliti'erential meehanism.

13. In gearing, alined shafts, a fixed gear on each of said shafts, and sliding means eoperating with said gears for obtaining various speeds, the distance between the remote sides ot Said gears being approxi'- mate@T equal to the aggregate Width of four l of the gear faces.

14. In gearing, alined shafts, a fixed gear on each o 't' said shafts, and sliding means cooperating with' said gears for obtaining two speeds and a direct drive, the distance between the remote sides of said gears being approximately equal to the aggregate Width of four of the gear faces.

15. ln gearing, alined shaft-s, and a countersha'ft, gears fixed on said alined shafts, and telescoping gears sliding on the countershaft for obtaining Various speeds, the distance between the remote sides of the fixed gears on, the alined shafts being approximately equal tothe aggregate Width of four of the gear faces.

In testimony whereof l aflix my signature in presence of two witnesses.

RUSSELL HUFF.

lVitnesses:

lV. H. FINCKEL, Jin, RICHARD E. MARS'mN. 

